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by inglor_cz 1615 days ago
The universe is huge and the Solar System alone could probably accomodate 50 billion humans. With something like artificial hibernation (we are discussing a pretty far future here), you could travel to nearby stars as well.

As for stagnation, there is an unspoken presumption built into your thought, namely that older rejuvenated people will gain younger bodies back, but that they will stay mentally old. I don't think this will be necessarily true. It rejuvenation works, it will have to work on the brain too, and rejuvenated people will revert to younger patterns of thinking as well. Only with more memories and experiences, which could actually improve their results. For example, they will be unlikely to join some populist cause if they burnt themselves twice already.